Syringe



Aug. 20, 1929. C. E. BRE MIL@ 1,725,111

SYRINGE Filed VJun@ 17, 1925 Patented Aug. 20, 1929.

UNITED STA Tiasvl PATENT oFFic-E.

' l CLIFFORDiE. BRE 'MILIEBh 0F CHICAGO, ILLINOIS, ASSIGNOR TO COOKLABORATORIES,

. INC., A CORPORATION OF DELAWARE v SYBINGE.

Application 1ed June 17,

- mic'syringes, and aims to provide an improved hypodermic syringe ofthe cartridge type. More particularly my invention involves improvementsover the prior l; art of breech loading cartridge syringes, features. ofthe invention being applicable however to cartridge syringes notnecessarily of the breech-loading type. My invention further involvesimprovements in connection with such syringes embodying or employing theplugged tube type of cartridge, and furl ther the provision ofVa'practicable and rel liable cartridge syringe for use with plugged1926'. Serial No. 116,547.

said barrel by pivot pins 10 projecting from -l I opposite sides of thebarrel near one end, Said pins extending into bayonet slots 11 formed inthe linner faces of said'arms. The described construction provides meanswhereby the syringe head 6 may be swung about 'the end of the barrel 5and 'may be disengaged therefrom when desired.

The syringe lunger rod 12 is carried by and movable t rough the hinged`syringe head 6 and is preferably slidable therein; At its outer end itis provided with an enlargement or handle 13 to facilitate pushing itinwardly during an injection; and on the tube cartridges inadministering hypodermim syringe headthere is the usual 'finger bar 14injections where high pressure isrequircd, as for instance -inadministering intraosseous injections. *l

The invention may be understood by reference to one illustrativeembodiment shown in the accompanying: drawings, in which: y

Fig. 1 is an elevation of the illustrative syringe; A

Fig. 2 is a longitudinal section-on an.en` larged scale, omittingportions of the instrument;

Fig.. 3 is a fragmentary view illustrating the opening of the syringefor refilling with a cartridge. -v

Fig. 4 is an enlarged sectionsubstantially on line 4 4 of Fig. 2;

Fig. 5 is a detail section showing the plunger rod engaged with thecartridge. clamping member; and

Fig 6 is an elevation of the clamping member. A

Referring to the drawings, there is shown aI cartridge syringecomprising a body, a medicament-containing cartridge held by the body, aneedle or canula piercing one end of the cartridge and exemplifying anaseptic medicament conduit leading from the interior of the cartridgeftothe point of injection, and a plunger movable longitudicartridge nallyof the'syringe body forexpelling the medicament.

In` the illustrative construction, the syr inge lbody consists of twohinged` parts 5 and 6 relatively movable into 'and out of axialalinementso as to open the instrument at its breech end for insertion orwith-- drawal of the cartridge 8, and for closing the instrument foroperative use.4 The syringe head-6 has two arms 9 embracing the end ofthe barrelpart 5 and vconnected with which is used with .the handleduring an injection, and in this instance is swiveledl on the syringehead.

In order to secure the hinged parts in alinement so that the plunger rodmay eject the contents of the cartridge, a locking sleevel l5 isprovided-'which is carried by the hinged head 6 and is projectibleacross the joint of the syringe so as to extend'within the open end ofthe barrel part 5. The locking sleeve is of sufiicient diameter ,toengage the rear end of the cartridge to clamp the same, as will bemorefully described, and it has an axial bore 16' to permit theplunger rod12 to slide through it.

In order to manipulate the locking mem bei, it may be engaged byscrew-threads 17 to the hinged head, as shown, and may loe provided withone or more recesses 18 to receive complementary projections 19lextending laterally from; the plunger rod adjacent its innerenlargedend 20.` In this instance said locking member is recessed at its innerend to enclose the enlarged end 20- of the plunger rod, and the recesses18 to be engaged by the projections 19'are formed at the baseof the mainrecess of said locking member. When the plunger rod is moved. backwardas far as it will go, and

then turned, its projections 19 will move The cartridge shown comprisesa tubular body such for instance as a glass tube having a slidable plug21 sealing one end and a recessed plug 22 sealing its oppositeend, saidrecessed plug 22 being formed with a flange 23 overlying the end of thecartridge tube which is adjacent the canula 24. vWhen the locking sleeveis advanced into locking position, it will force the cartridge forwardso that Iits fore sealing plug 22 will be pierced bythe canula andthe'flange 23 of the plug will be clamped between the end of thecartridge tube and the inner surface of the front syringe-barrel head.Thus the car-A tridge is substantiallyT rigidly clamped between endabutments therefor, so as to prevent outward movement of the flangedplug 22 during the fluid-ejecting operation, by the driving forward ofthe plug 21 by the plunger, even though there be high pressur within thecartridge.

In actual practice, it is most convenient to use cut sections of glasstubing to provide the tubular cartridge bodies, and such sections aresometimes uneven at the eut surfaces; and due to this unevenness and thebrittleness of glass, the butt end of the glass cartridge tube, if tootightly engaged by the locking member, may chip and break off, possiblypreventing use of the cartridge.

` To eliminate any likelihood of breaking the cartridge, a slightlyresilient washer 25 (Fig. 2) may be interposed between the butt end ofthe cartridge' tube andthe clamping member. The washer may be fast toeither the cartridge or the clamping.v member, or

.may be separate from both; whether fast or loose, its `resiliency issufficient to permit the heavy thrust of the clamping member to betransmitted to the end of the brittle car tridge body without danger ofbreakage.

It will be observed that the screw threaded llocking member 15 is notonly usable to hold the -hinged parts of the syringe in alinemcnt and toclamp the cartridge, but may also greatly facilitate piercing of thecartridge, by advancing the cartridge against the point of a previouslypositioned canula.

The clamping functionl of the screw inember 15, whereby the cartridge issubstantiallv rigidly clamped between said member and the abutmentprovided by the front head of the cartridge holding body or instrument,is advantageous to 4 resist relative displacement between the cartridgetube and itslfore sealing plug 22 during the fluid-ejecting operation,and especially when administering hypodermic injections underconditionswhere a high pressure is required, as for instance in makingintraosseous injections. The high pressure imposed on the rear pis- Vton plug 21, and transmitted through the By virtue of the projections 20of the plunger rod, engageable with the recesses 1S in the screw member15, the plunger rod may be engaged with said screw member for operatingthe same' by rotation of the plunger rod, either for advancing the screwto lock the instrument and to thrust forward and clamp the cartridge, orfor retracting the screw to unlock the instrument; while at the sametime lthe plunger rod is freely 'slidable in said screw memberso thatthere is no interference with the independent operation `of the plungerrod to drive in the rear piston plug 21 and eject the fluid contentsfrom the cartridge through the needle or canula piercing the forecartridge plug. The operation of the screw by turning the plunger isconvenient and, by virtue of the leverage obtained through the handle13, enables the screw /to be readily screwed tight to clamp thecartridge with considerably greater pressure than could readily beapplied if the screw had to be operated directly by engaging a fingerpiece thereon v binations and sub-combinations as defined in the claims.j

What I claim is:

` 1.4 A syringe ofthe class described comprising, in combination, abody; a medicament cartridge held by the body; a plunger rod forexpelling the contents of the cartridge; and means operated by turningthe plunger' rod for moving the cartridge longitudinally of the body.

2. A syringe-of the class described comprising, in combination, a body;a medicament cartridge held by the body; a plunger rod for expelling thecontents of the cartridge; and a member at the plunger rod end of thesyringe having means engageable by cooperative means on the plunger rod,and being advanced into the body by rotation of the plunger rod whenengaged therewith so as to clamp the cartridge.

3. A syringe of the class described comprising, in combination, a body;a medicarod for expelling the contents of the cartridge; and a sleeveengaged by screw threads with the'syringe end which is opposite from theneedle end, and having means for engagement with the plunger rod so thatthe plunger rod may be used to advance 1t within the syringe body toclamp the car.

f tridge in place.

4. A syringe of the class,described4 comrising in combination a-bod amedicament cartridge held by the body; a plunger rod for expelling thecontents of-the car- `tridge; said plunger rod having a handle at theouter end; and a screw threaded sleeve t movable into the body from theplunger rod end thereof and engageable by the inner end of said plungerrod to effect rotation thereof to clamp the cartridge.

5. syringe of the class described comprising, 1n combination, a body; amedical the cartridge within the body until it is- Aprising, incombination, a body; a

ment cartridge held by the body;

ment cartridge held by the body; a lunger rodfor expelling the contentsof t e cartridge; and means for moving the cartridge to clamp it withinthe body, said means eiigageable with the plunger rod end when theplungersrod is outermost to cause rotation" thereof on turning theplunger rod, and being disenga eable from `Vthel plunger rod by merelypus ing inwardly thereon.

6. A syringev of the class Idescribed comprising, in combination, abody;- a medicaa plunger rod .for expellin the contents of thecartridge; a screw-t readed sleeve for moving clamped, saidl sleevehaaving an internal recess; the plunger rod having a handle at its outerend and a lateral projection near its inner end', the projection beingengageable atI will with the recess in the sleeve, soi

that the sleeve is easily` rotated by turning the syi'inge handle. Y

' A syringe of the class described, conip lunger rod movablelongitudinally of the llibdy; a medicament container held by the bodycomprising. a tube having a picrceable sealy ing plug in its fore endand being constructed and arranged to have its interior volume reducedbythe plunger rod to expel the medicament; said body having an abutm'entfor saiddplug and means operable b the plunger'ro to move the containerlongitudinally of thle j stantially rigidly o'r non-yieldingly with saidplug a ainst said abutment yso that the plug cannot e forced out by thehydrostatic pressure created within .the container duringan injection,.the plunger rod being engageable with said means to operate the same toclam the cartridge and being independentlyvsli able to operate saidcontainer.

8..A vsyringe of the class described comprising, in combination, asyringe body; a plunger rod slidable on the syringe body; a

medicament containing cartridge consisting I .41,55 of a cylindricalbody;

a plug sealing one body and toelamp it sub end thereof' and' slidabletherethrough and a flanged plug sealing the other end but not slidable,so that it may be pierced by the needle of the syringe withoutdisplacement;

and means operable turning the plunger rod to move the cartridgelongitudinally of the syringe body and to clamp its flanged plug so-thatsaid plug' is'not forced out by l a plunger rod carried by .the syringehead and slidable through said locking member; and inter-engaging meanson the locking member and plunger rod so that said rod may move thelocking member from inactive .to active position and vice versa.-

10. A syringe of the class described comprising, in combination asyringe body hav'- in a hinged head which, W en swung to one si e,exposes an opening in the bod a I nedicament containing'lcartridge helby the body and insertible in and removable through said opening;'needle securing means; a member carried by the hinged syringe head andprojectable across the joint between the head and-the body of the syringe to lock said parts in operative position;

said member being screw threaded in the syringe head .and having anaxialbore; a plunger ro'd having a handle at its outer end and slida'blethrough'the axial bore of the locking member; and means on the inner endof the plunger rod for connecting it to thelocking member toactuate thesame.

1'1. A syringe comprising a-b`ody portion` A and .a head hinged`thereto, a plunger reciprocable with "res ct tosaid head, a memberengaging said head and movable with respect thereto to lock said head inoperative position 'with respect to said body portion, said member beingapertured for pas' sage of said plunger, and means associated with'saidplunger and member whereby they may be releasably rconnected so thatsaid I member may be moved by the plunger'to and fromlocking position.

12. A syrin e comprising a body portionI and a head ingedly. attachedthereto, a plunger, a. locking member threadedlyA engaging said head,said head and member being apertured for passage of. saidfplunger, saidmember being operable by said plunger to move into and 4out of ositionlocking said head in operative relation to said body portion. l

13. In a cartridge-syringe,l a ecartridge holding and operatinginstrument lhaving a cartridge-piercing canula at its fore endand aplunger in its breech end, said instrument constructed lto permitopening for insertion of the cartridge and embodying thrust meansoperable by the plunger to push against the butt end ofthe cartridgeand-force it to its holding and operating instrument having a.

cartridge-piercing canula at its fore end and a plunger in its breechend, said instrument constructed to permit opening for insertion of thecartridge and embodying thrust ,means operable by the plunger to pushagainst the butt end of the cartridge and force it to itsforward-position, the plunger and thrust means having cooperative meanswhereby the thrust means may be operated by turning the plunger whilethe plunger is independently longitudinally movable to operate thecartridge.

15. In a cartridge-syringe, a plunger-carrying cartridge-holding andoperating instrument embodying relatively longitudinallyK movableabutments for the fore and rear ends of the cartridge and'means operableby the plunger to cause a firm clamping of the cartridge by and betweensaid end abutments, the plunger being connectable with said means foroperating the same and releasabletherefrom to permit -independentoperation of the plunger to operate the cartridge.

16. In a cartridge-syringe, a plungercarrying cartridge-holding andoperating instrument embodying relatively longitudinally movableabutments for the fore and rear ends of the cartridge and Imeansoperable by the plunger to cause a rm clamping of the cartridge by andbetween said end abutments, said means being operable by rotating theplunger and the plunger being independently longitudinally movable tooperate the cartridge.

17. In a cartridge-syringe,- a cartridgeholder having acartridge-piercing canula at its fore end and having a breech headdisplaceable to permit endwise insertion of the cartridge; a hollowscrew mounted in said breech head and adapted to be screwed thereinagainst the butt end of the cartridge to thrust it forward and insurepiercing by the needle; and a cartridge-operating plunger engageablewith said screw to operate the same and slidable in said screw tooperate the cartridge.

18. In a cartridge syringe, a cartridgeholder having al hinged breechhead, a hollow screw in said head cooperable with the body of the holderto lock the head in place, and adapted to 'be unscrewed to permitswinging the head laterally to allow endwise insertion of the cartridge;and a cartridgeoperating plunger slidable in said screw, said plungerand screw having cooperating means whereby the screw may be operated by,turning the plunger.

19. In a cartridge-syringe, a jointed cartridge-holding and operatin ginstrument having a cartridge-operating plunger and adapted to be openedfor insertion of the 'cartridge and to be closed for operative use, saidinstrument comprising hinged or pivotallyconnected parts adapted to berelatively displaced for opening`the instrument and having anaxially-adjustable locking screw, 4in

lwhich the plunger works, cooperable with the said parts to hold theinstrument closed,

said screw and plunger having cooperable means by which the screw may beoperated by the plunger.

20. In a cartridge-syringe, a breech-loading cartridge-holding andoperating instrument, jointed to permit swinging its rear portionrelative to its front portion for openingthe instrument to permitinsertion or` withdrawal of the cartridge; said front portion embodyingan -abutment for the -fore end of the cartridge. and adapted toaccommodate a cartridge-piercing canula; and a hollow screw and plungercarried by said rear portion, said plunger freely slidable in saidscrew, and-the screw and plunger having cooperating means whereby thescrew may be rotated by turning the plunger; said screw adapted tobridge the jointed parts of the instrument to lock the same in closedcondition and to bear on the buttl endv of the cartridge and thrust itforwardagainst saidv abutment.

21. In a cartridge-syringe, a jointed cartridge-holding and operatinginstrument,-

Aadapted to be opened for introduction o fa cartridge and .to be closedfor operative use,

said instrument embodying a cartridge-operat-ing plunger and anassociated screw operable by the-plunger to lock the instrument Intestimony whereof, I have signed my name to this specification.

CLIFFORD E.. BRE MILLERl

